JP4474346B2 - Driving tool - Google Patents

Description

  The present invention relates to a driving tool for driving a driving material by linearly operating a driver by the elastic force of an elastic element.

  In the utility model registration No. 2557754 (Patent Document 1), in a nailing machine that uses the elastic force of a coil spring as a driving force of a driver's driving operation, a driver performing a nailing operation meshes with a nail in the driving path. A mechanism is disclosed that prevents the driver from being driven by the spring force of the coil spring when performing the operation of releasing the nail clogging when the nail clogging occurs. In the nailing machine described in Patent Document 1, when a magazine loaded with a nail is moved to a position away from the movement locus of the driver, the magazine is locked to the driver or a plunger that drives the driver in relation to the movement operation. Thus, an engagement member that restricts the driving of the driver is provided.

However, in the case of the nailing machine described in Patent Document 1, the resilient force of the coil spring is held without being released. For this reason, when the engagement with the plunger or the driver by the engaging member is erased for some reason, the driver may be driven unexpectedly, and there is room for improvement in this respect.
Utility Model Registration No. 2557754

  In view of the above, an object of the present invention is to provide a technique capable of reliably preventing the driver from being driven when the engagement work between the driver and the driving material is released in the driving tool.

In order to achieve the above object, the invention described in each claim is configured.
According to the first aspect of the present invention, the elastic element, the hammer that moves linearly in the driving direction by the elastic force of the elastic element, and the hammer that drives the driving material linearly in the driving direction together with the hammer. A driving work tool having a driver that performs the work and a connecting member that connects the hammer and the driver is configured. Typically, the “driving tool” in the present invention corresponds to a nailing machine or a tacker, and the “driving material” is a straight rod having a sharp tip, and has a cap on the head. A material having or not having a U-shaped staple or the like is widely included. The “elastic element” in the present invention typically corresponds to a coil spring.
In the first aspect of the present invention, as a characteristic configuration, the hammer and the driver have connecting portions overlapping each other. Further, the connecting member is formed by a rod-like member that is inserted so that it can be extracted from the direction intersecting the driving operation direction of the driver with respect to the connecting part, and the hammer and the driver are connected by being inserted into the connecting part, It is configured to release the connection between the hammer and the driver by being pulled out from the connection part, and when the elastic force of the elastic element is released by releasing the connection between the hammer and the driver, the released bullet is released. The force was not transmitted to the driver. If the elastic element is, for example, a compression coil spring, the elastic force stored by compressing the compression coil spring is released from the compressed state by releasing the connection between the hammer and the driver. It is released by returning to, and a state in which the released elastic force is not transmitted to the driver is obtained. According to the present invention, by releasing the connection between the hammer and the driver by the connecting member, it is possible to completely disconnect the driver from the elastic element and to prevent the elastic force from acting on the driver. As a result, in the driving path of the driving material by the driver, when the driver and the driving material mesh with each other and a malfunction occurs, it is surely prevented that the driver is driven by the elastic force at the time of releasing the meshing operation. be able to.

In addition, about the cross-sectional shape of the rod-shaped member which comprises a connection member , circular, an ellipse, or a square shape is included widely. According to the present invention, the rod-like member can was inserted into the connection portion of the hammer and the driver, or easily perform connection or a release operation of the hammer and the driver by withdrawing.

(Invention of Claim 2 )
According to the invention described in claim 2 , the driving tool according to claim 1 is detachably attached to the housing for covering the elastic element , the hammer and the driver, and the opening formed in the housing. And a mounted cover member. The connecting member is attached to the cover member, and when the cover member is removed from the housing, the connection between the hammer and the driver is released while maintaining the attached state to the cover member.
In the present invention, as an aspect of “attaching the connecting member to the cover member”, the connecting member is movable along with the driver along the rail portion provided on the cover member, that is, a direction intersecting the moving direction, that is, the housing. It is preferable to mount the cover member in a state in which movement is restricted in the direction in which the cover member is removed. As a rail part, the aspect comprised by the plate-shaped guide member which has a linear groove | channel, or a rod-shaped guide member is included suitably. According to the present invention, when the connecting member is attached to the cover member and the cover member is removed from the housing, the connecting member releases the connection between the hammer and the driver while maintaining the attached state with respect to the cover member. For this reason, by removing the cover member from the housing, it is possible to release the connection without performing the connection release work by the connection member. This improves the work efficiency.

(Invention of Claim 3 )
According to a third aspect of the present invention, in the driving tool according to the second aspect , a driving material driving path is provided at a front end region of the driver in the driving direction of the housing. The driving passage is configured to be able to be opened outward in a direction crossing the driving direction of the driver by manual operation, and for the cover member, the operation of removing the cover member from the housing is performed from the opening operation of the driving passage outward. Is also provided with work order designation means for giving priority to the work. In the present invention, “can open to the outside” means that a part of the path constituting member constituting the driving path is moved in a direction intersecting the driving direction of the driving material, that is, in the radial direction of the path. The mode of opening corresponds to this, and includes a mode of removing a part of the passage constituting member and opening it, a mode of rotating around an axis parallel to the driving direction with one end as a fulcrum, and the like. The “work order designation means” in the present invention suitably includes, for example, an aspect in which the user is informed of the work order using numbers or the like, or an aspect in which the work order is forced using a mechanical structure. According to the present invention, by specifying the work order, it is possible to release the engagement between the driver and the driving material in a state where the driver is disconnected from the elastic element and the elastic force acting on the driver is erased.

(Invention of Claim 4 )
According to a fourth aspect of the present invention, the work order designating means in the driving tool according to the third aspect is provided so as to extend from the cover member to the outward opening region of the driving passage, and the cover member is disposed in the housing. Unless it is removed from, the opening work obstructing piece cannot be used by the user to open the driving path outward. According to the present invention, when the cover member is removed from the housing, it is possible to open the driving passage outward. In other words, the work order is forcibly determined, and thus the engagement between the driver and the driving material is released in a state where the driver is disconnected from the elastic member and the elastic force acting on the driver is erased. Can do.

  According to the present invention, in the driving work tool, a technique is provided that can surely prevent the driver from being driven when the engagement between the driver and the driving material is released.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The present embodiment will be described using a rechargeable pin tacker as an example of a driving work tool. FIG. 1 is a side sectional view showing an overall configuration of a rechargeable pin tacker 100 according to the present embodiment, and FIG. 2 is a sectional view based on the line AA in FIG. FIG. 3 shows an enlarged cross-sectional view of the configuration of the main part of the pin tacker 100. As shown in FIG. 1, the pin tacker 100 according to the present embodiment generally includes a main body 101 that forms an outer shell of the pin tacker 100, a battery case 109 that houses a battery, and a workpiece. The magazine 111 is mainly composed of pins as a driving material to be driven. The main body 101 includes a motor housing 103 that accommodates a drive motor 113, a gear housing 105 that accommodates a driving mechanism 117 and a hammer drive mechanism 119, and a hand grip 107 gripped by an operator. A hand grip 107 is disposed above the motor housing 103, a gear housing 105 is disposed at one horizontal end (the right side in FIG. 1) of the motor housing 103 and the hand grip 107, and a battery case 109 is disposed at the other horizontal end. Be placed. A magazine 111 is disposed below the motor housing 103 and the gear housing 105. The magazine 111 is configured to supply a pin to be driven to the lower end portion of the gear housing 105, that is, the pin injection portion 112 connected to the distal end portion of the main body portion 101. The gear housing 105 corresponds to a “housing” in the present invention.

  As shown in FIG. 3, the driving mechanism 117 includes a rod-shaped slide guide 121 that extends linearly in the vertical direction and has an upper end portion and a lower end portion fixed to the gear housing 105, and a cylindrical shape on the slide guide 121. A hammer 125 mounted so as to be movable up and down via a slider 123, a compression coil spring 127 that applies a resilient force to the hammer 125 so as to drive the hammer 125 downward, and driven by the hammer 125 for injection. A driver 129 that applies a striking force to the pin supplied to the pin driving port 112a of the section 112 and drives the pin into the workpiece by this is mainly configured. The compression coil spring 127 corresponds to the “elastic element” in the present invention. Further, the pin driving port 112a corresponds to the “driving passage” in the present invention.

  The hammer 125 and the driver 129 are connected by a connecting pin 131. A connection structure between the hammer 125 and the driver 129 by the connection pin 131 will be described later. The hammer 125 has upper and lower engaging protrusions 125a and 125b that are engaged with the upper and lower lift rollers 137 and 139 of the hammer drive mechanism 119 and pushed upward. For convenience, illustration of pins and workpieces is omitted.

  The rotational output of the drive motor 113 is transmitted as a rotational motion to the hammer drive mechanism 119 via the planetary gear type reduction mechanism 115. As shown in FIGS. 2 and 3, the hammer drive mechanism 119 includes upper and lower gears 133 and 135, which are meshed and engaged with each other and rotated in opposite directions within the vertical plane, and lower gears 133 and 135. The upper and lower lift rollers 137 and 139 (see FIG. 2) that push the hammer 125 upward in accordance with the rotational movement of 135 are mainly configured. The gears 133 and 135 are rotatably mounted on a frame 134 disposed in the gear housing 105 via shafts 133a and 135a. The lift rollers 137 and 139 are rotatably mounted via support shafts 137a and 139a at positions eccentric from the rotation centers of the gears 133 and 135, and circularly move around the centers of the gears 133 and 135 as the gears 133 and 135 rotate. That is, it moves in an arc shape. The lower gear 135 is meshed with and engaged with a drive gear 115b formed on the output shaft 115a of the speed reduction mechanism 115, and is driven to rotate at a predetermined speed reduction ratio. The gear ratio of the lower gear 135 and the upper gear 133 is set to 1: 1. Further, the lower lift roller 139 and the upper lift roller 137 are arranged to have a phase difference of about 180 degrees. The upper and lower lift rollers 137 and 139 are positioned farthest from each other, that is, the lower lift roller 139 is placed at the lower position of the lower gear 135, and the upper lift roller 137 is placed above the upper gear 133. This state (the state shown in FIG. 2) is the initial position.

  When the drive motor 113 is energized and the upper and lower gears 133, 135 are rotated in the direction of the arrow in FIG. 2, the lower lift roller 139 engages with the lower engaging protrusion 125 b of the hammer 125 from below and moves upward. And the hammer 125 is pushed upward by the vertical component of the circular motion. When the push-up amount of the hammer 125 by the lower lift roller 139 reaches near the maximum, the upper lift roller 137 engages with the engagement protrusion 125a of the upper portion of the hammer 125 from below and circularly moves upward, Push the hammer 125 upward. Thus, the hammer 125 is moved from the bottom dead center (pin driving end position, which corresponds to the initial position) to the upper side, that is, the top dead center side via the relay between the upper and lower lift rollers 137, 139. The compression coil spring 127 is compressed by the upward movement operation of 125, and the elastic force is accumulated. In the vicinity of the top dead center, the engagement protrusion 125 a on the upper portion of the hammer 125 is further transferred from the upper lift roller 137 to the cam 140. When the driver 129 is pulled upward together with the hammer 125, the pins loaded in the magazine 111 are supplied to the pin insertion port 112a of the injection unit 112, and then the engagement with the cam 140 is released at the same time. The hammer 125 is driven downward by the elastic force of the compression coil spring 127. As a result, the pin supplied to the pin driving port 112a of the injection unit 112 is driven into the workpiece by the driver 129 that descends in the pin driving port 112a. The hammer 125 that has been driven in is held at the bottom dead center by contacting the stopper 126.

  The hand grip 107 is provided with a trigger 141 that energizes and drives the drive motor 113 by a pulling operation, and a safety lever 143 that prohibits the pulling operation of the trigger 141. The trigger 141 cannot be pulled when the safety lever 143 is placed in the locked position indicated by the solid line in FIG. 1, and when the safety lever 143 is placed in the unlocked position indicated by the phantom line in FIG. 1. Pull operation is possible. The main body 101 is provided with a light 145 that irradiates a pin driving area. When the safety lever 143 is placed in the unlocked position, the light 145 is turned on when the light lighting switch 147 is turned on by the safety lever 143, and when the safety lever 143 is placed in the locked position. In addition, the light switch 147 is turned off when the light switch 147 is turned off.

  The drive motor 113 includes a first switch 148 for driving the motor that is directly operated by the trigger 141, and a second switch (not shown) for driving the motor that is operated by the switch mechanism 161 that is interlocked with the pulling operation of the trigger 141. The energization is driven when each of the first switches is turned on, and the power is cut off when either the first switch 148 or the second switch is turned off. 1 and 3, the first switch 148 and the second switch are arranged so as to overlap each other. For this reason, illustration of the second switch is omitted. When the drive motor 113 is energized, the hammer drive mechanism 119 is driven via the speed reduction mechanism 115 as described above. The hammer drive mechanism 119 moves the hammer 125 up from the bottom dead center while compressing the compression coil spring 127. Push up to the dead center. The hammer 125 that has reached the top dead center is driven downward by the resilient force of the compression coil spring 127, thus completing a single driving operation by the hammer 125.

  Further, as described above, when the trigger 141 is pulled, and the hammer 125 performs a single driving operation, the second switch operated by the switch mechanism 161 is triggered when the pin driving operation is completed. Even if the pulling operation 141 is maintained, the operation is turned off. That is, when the first pin driving operation by the hammer 125 is completed, the drive motor 113 is de-energized at that time, and even if the pulling operation of the trigger 141 is maintained, the configuration cannot be shifted to the second pin driving operation. Has been. This prevents so-called double hitting of the pin, but since this double hit prevention is not directly related to the present invention, the detailed description of the configuration is omitted. In addition, when the pulling operation of the trigger 141 is canceled after the drive motor 113 is energized by the pulling operation of the trigger 141 and before the pin driving operation by the hammer 125 is completed, the first operation is performed directly by the trigger 141. 1 switch 148 is turned off, and it is possible to interrupt the driving operation of the pin by the hammer 125 by cutting off the energization to the drive motor 113.

  Next, a connection structure between the hammer 125 and the driver 129 will be described in detail with reference to FIGS. 4 and 5. As shown in the drawing, the driver 129 is arranged so that the upper end portion thereof overlaps the hammer 125. The hammer 125 and the driver 129 are connected to each other by a connecting pin 131 as a rod-like member inserted into the attaching holes 125c and 129a provided in the overlapping portions, and the connecting pin 131 is removed from the attaching holes 125c and 129a. The connection is released (see FIG. 5). The connecting pin 131 corresponds to the “connecting member” in the present invention. The insertion / removal direction of the connecting pin 131 is orthogonal to the pin driving direction of the driver 129.

  A front cover 151 that covers the opening 105a (including the connection portion of the hammer 125 and the driver 129) is disposed on the front surface of the gear housing 105, and the front cover 151 includes a plurality of screws (not shown) and the like. It is detachably fixed to the gear housing 105 by a wearing tool. The front cover 151 corresponds to a “cover member” in the present invention. On the inner surface of the front cover 151, a guide member 153 provided with a guide groove 153a extending linearly in the moving direction (vertical direction) of the driver 129 is provided. The guide member 153 is made of a plate-like member that is long in the vertical direction, and is arranged such that a predetermined gap C is formed between the guide member 153 and the inner wall surface of the front cover 151.

  The connecting pin 131 is movably engaged with the guide groove 153a of the guide member 153, and a flange portion 131a having a larger diameter than the pin portion formed at one end in the axial direction of the connecting pin 131 is connected to the guide member 153 and the front. It is arranged in the gap C between the covers 151. As a result, the connecting pin 131 is mounted in a state in which the connecting pin 131 is allowed to move with the driver 129 relative to the front cover 151 and the movement of the connecting pin 131 is restricted in the axial direction. For this reason, after removing the screw that secures the front cover 151 to the gear housing 105, the front cover 151 is moved forward (to the right in the drawing) and separated from the gear housing 105 as shown in FIG. 5. Then, the connecting pin 131 is pulled out from the mounting holes 125c and 129a of the hammer 125 and the driver 129, and the connection between the hammer 125 and the driver 129 is released while maintaining the mounting state with respect to the front cover 151.

  The injection unit 112 includes a driver guide 155 that guides the movement of the driver 129, and a driver guide cover 157 that is disposed on the front surface (right side in the drawing) of the driver guide 155 so as to face the driver guide 155. The driver guide 155 and the driver guide cover 157 constitutes a pin insertion port 112a. The driver guide 155 is fixed to the gear housing 105, and the driver guide cover 157 is detachably fixed to the driver guide 155 by a plurality of screws 156 as fixing tools. That is, the pin driving port 112a is configured to be opened outward in a direction intersecting the driving direction of the driver 129 by removing the driver guide cover 157, which is a constituent member of the pin driving port 112a, from the driver guide 155. Yes. The lower edge of the front cover 151 located above the driver guide cover 157 is provided with a protruding piece 151a that protrudes downward, and at least one screw 156 of the plurality of screws 156 is provided by the protruding piece 151a. It is covered and the removal operation of the screw 156 is obstructed. That is, the projecting piece 151a constitutes an opening work obstructing piece that obstructs the work of removing the screw 156, and thus the outside opening work of the pin insertion port 112a, and corresponds to the “work order designating means” in the present invention. To do.

  The pin tacker 100 according to the present embodiment is configured as described above. When the trigger 141 is pulled by the user and the drive motor 113 is energized, the hammer 125 and the driver 129 are compressed from the bottom dead center while compressing the compression coil spring 127 via the hammer drive mechanism 119 as described above. After moving to the top dead center, it is driven downward from the top dead center by the elastic force of the compression coil spring 127. As a result, the pin placed in the pin driving slot 112a of the injection unit 112 is driven into the workpiece by the driver 129. During the pin driving operation, when the pin and the driver 129 are engaged with each other in the pin driving port 112a of the injection unit 112 and so-called pin clogging occurs, the driver 129 is engaged with the lift rollers 137 and 139 in the middle of the driving stroke. Without matching, it stops in a state where it receives the elastic force of the compression coil spring 127 via the hammer 125.

  In the present embodiment, since the hammer 125 and the driver 129 are connected by a detachable connecting pin 131, when the pin clogging occurs, the connecting pin 131 is removed from the mounting holes 125c and 129a, By releasing the connection between the hammer 125 and the driver 129, the elastic force of the compression coil spring 127 with respect to the driver 129 can be eliminated, and the pin clogging can be released in this state. In other words, according to the present embodiment, the pin clogging can be released after the pins cannot be popped out. The hammer 125 released from the connection with the driver 129 by the connection pin 131 is moved to the bottom dead center by the elastic force of the compression coil spring 127 and is held by the stopper 126 or engaged with the lift rollers 137 and 139. And hold.

  Further, according to the present embodiment, since the connection pin 131 is mounted on the front cover 151, the front cover 151 is removed from the gear housing 105 and the opening 105a is opened to perform the operation of releasing the connection by the connection pin 131. When opened, the connecting pin 131 is removed from the hammer 125 and the driver 129 at the same time that the front cover 151 is removed. For this reason, work man-hours can be reduced and work efficiency can be improved. In a state where the pin tacker 100 is operating normally, the connecting pin 131 moves along the guide member 153 together with the driver 129 and does not hinder the driving operation by the driver 129.

  The pin clogging release operation is performed by removing the driver guide cover 157 from the driver guide 155 for the injection portion 112 where the pin clogging occurs. In this case, in this embodiment, since the screw 156 for fixing the driver guide cover 157 to the driver guide 155 is covered by the projecting piece 151 a provided on the front cover 151, the front cover 151 is removed from the gear housing 105. The driver guide cover 157 cannot be removed unless it is removed. That is, it is a configuration that defines the work order. When the front cover 151 is removed from the gear housing 105, the connecting pin 131 is removed from the hammer 125 and the driver 129, and the subsequent removal work of the driver guide cover 157 from the driver guide 155 is an elastic force of the compression coil spring 127. This can be done in a state where the problem is solved.

  In the present embodiment, the connecting member that connects the hammer 125 and the driver 129 is configured by the connecting pin 131 as a rod-shaped member that can be inserted into and removed from the mounting holes 125c and 129a. However, the present invention is not limited to this. There is no limitation as long as the connection can be released, such as a screw. In this embodiment, the connecting pin 131 is attached to the front cover 151, and when the front cover 151 is removed from the gear housing 105, the connecting pin 131 is removed from the hammer 125 and the driver 129. A configuration separated from the cover 151 may be changed. Further, although the present embodiment has been described using the pin tacker 100, the present invention can be applied to any driving tool of a type that drives the hammer 125 by the resilient force of the compression coil spring 127. The compression coil spring 127 may be changed to a tension coil spring.

In view of the gist of the invention, the following aspects can be configured.
(Aspect 1)
“A driving tool according to claim 3,
The connecting member is formed by a rod-like member that is removably inserted into a connecting portion between the elastic element and the driver from a direction crossing the driving direction of the driver, and moves together with the driver via a guide member. A driving tool that is mounted on the cover member in a state in which movement is restricted in a direction that intersects the moving direction. "

(Aspect 2)
"A driving work tool according to claim 4 or 5,
The driving passage can be opened to the outside by removing a part of the constituent members constituting the driving passage, and the opening work obstruction piece is fixed to detachably fix a part of the constituent members. A driving tool characterized by being configured to obstruct the removal of the tool. "

It is side sectional drawing which shows the whole structure of the rechargeable pin tacker which concerns on embodiment of this invention. It is sectional drawing based on the AA line of FIG. It is an expanded sectional view showing the composition of the principal part of a pin tacker. It is sectional drawing which shows a pin clogged state, and shows the state from which the magazine was removed. It is sectional drawing which shows a pin clogged state, and shows the state from which the magazine and the front cover were removed.

100 pin tacker (driving work tool)
DESCRIPTION OF SYMBOLS 101 Main body part 103 Motor housing 105 Gear housing 105a Opening part 107 Hand grip 109 Battery case 111 Magazine 112 Injection part 112a Pin insertion port (injection path)
113 Drive motor 115 Deceleration mechanism 115a Output shaft 115b Drive gear 117 Driving mechanism 119 Hammer drive mechanism 121 Slide guide 123 Slider 125 Hammer 125a Upper engagement protrusion 125b Lower engagement protrusion 125c Mounting hole 126 Stopper 127 Compression coil spring (elastic element) )
129 Driver 129a Mounting hole 131 Connecting pin (connecting member)
131a Flange 133 Upper gear 133a Shaft 134 Frame 135 Lower gear 135a Shaft 137 Upper lift roller 137a Support shaft 139 Lower lift roller 139a Support shaft 140 Cam 141 Trigger 143 Safety lever 145 Light 147 Light lighting switch 148 Motor Driving first switch 151 Front cover 151a Projection piece 153 Guide member 153a Guide groove 155 Driver guide 156 Screw (fastening tool)
157 Driver Guide Cover 161 Switch Mechanism

Claims (4)

An elastic element;
A hammer that moves linearly in the driving direction by the elastic force of the elastic element ;
A driver that linearly moves in the driving direction together with the hammer to perform the driving work of the driving material;
A connecting member for connecting the hammer and the driver;
The hammer and the driver have connecting portions that overlap each other,
The connecting member is formed by a rod-like member that is detachably inserted from a direction intersecting the driving operation direction of the driver with respect to the connecting part, and the hammer and the driver are inserted into the connecting part. And the hammer and the driver are disconnected by being removed from the connection part, and the elastic force of the elastic element is released by releasing the connection between the hammer and the driver. A driving work tool characterized in that when released, the released elastic force is not transmitted to the driver . The driving tool according to claim 1 ,
A housing that houses the elastic element, the hammer, and the driver; and a cover member that is detachably attached to the housing to cover an opening formed in the housing;
The connecting member is mounted on the cover member, and when the cover member is removed from the housing, the connection between the hammer and the driver is released while maintaining the mounting state with respect to the cover member. A driving tool characterized by that. A driving tool according to claim 2 ,
The driver has a driving path for the driving material at a front end region of the driver in the housing, and the driving path is configured to be opened outward in a direction intersecting the driving direction of the driver by manual operation. The driving tool characterized in that the cover member is provided with a work order designating unit that prioritizes the work of removing the cover member from the housing over the work of opening the driving passage outward. A driving tool according to claim 3 ,
The work order designating means is provided extending from the cover member to the outward opening region of the driving passage, and unless the cover member is removed from the housing, the user can move the driving order designation means outward of the driving passage. A driving tool comprising an open work obstructing piece which cannot perform an open work.

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